| Honckenya |
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| Scientific classification |
| Kingdom: |
Plantae |
| Clade: |
Tracheophytes |
| Clade: |
Angiosperms |
| Clade: |
Eudicots |
| Order: |
Caryophyllales |
| Family: |
Caryophyllaceae |
| Genus: |
Honckenya
Ehrh. |
| Species: |
H. peploides |
| Binomial name |
Honckenya peploides
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| Synonyms |
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- Adenarium marinum Gray
- Adenarium maritimum Raf.
- Adenarium peploides Raf.
- Alsine peploides Crantz
- Ammodenia maritima (Raf.) E.P.Bicknell
- Ammodenia peploides (L.) Rupr.
- Ammodenia peploides var. diffusa (Hornem.) Porsild
- Ammodenia peploides subsp. maritima (Raf.) W.Stone
- Ammonalia peploides (L.) Desv.
- Arenaria littoralis Salisb.
- Arenaria peploides L.
- Arenaria peploides var. diffusa Hornem.
- Arenaria peploides f. lamoureuxii Lepage
- Arenaria portulacea Lam.
- Arenaria sitchensis D.Dietr.
- Cerastium succulentum Crantz
- Halianthus peploides Fr.
- Holosteum succulentum L.
- Honckenya diffusa (Hornem.) Á.Löve
- Honckenya frigida Pobed.
- Honckenya maritima (Raf.) Raf.
- Honckenya peploides var. diffusa (Hornem.) Ostenf.
- Honckenya peploides var. latifolia Fenzl
- Merckia peploides G.Don
- Minuartia peploides (L.) Hiern
- Minuartia peploides var. diffusa Mattf.
- Minuartia peploides subsp. latifolia (Fenzl) Mattf.
- Minuartia peploides var. typica Mattf.
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Honckenya peploides, the sea sandwort (UK) or seaside sandplant (Canada), is the only species in the genus Honckenya of the plant family Caryophyllaceae. Other common names include sea chickweed, sea pimpernal, sea-beach sandwort, and sea purslane. The scientific name is often spelled "Honkenya", and is named after the German botanist Gerhard August Honckeny (or Honkeny). This plant has a circumboreal distribution.
The plant is a succulent perennial growing at the edge of the sea. It has small greenish white pentamerous flowers with 10 stamens in the male flowers borne in the leaf axils. The fruit capsule opens in three valves.